牙科实验室中的灰尘。第二部分：粒度分布的测量。

Dust in dental laboratories. Part II: Measurement of particle size distributions.

作者信息

Brune D, Beltesbrekke H, Strand G

出版信息

J Prosthet Dent. 1980 Jul;44(1):82-7. doi: 10.1016/0022-3913(80)90053-0.

Abstract

It has been demonstrated in a previous study that threshold limit values of various elements or compounds could be considerably exceeded in various work operations in the dental laboratories when appropriate ventilation systems were not used. This refers to working with chromium-cobalt alloys, amalgam dies, porcelain, and gypsum. In the present study, size distributions of particles arising from cutting, grinding, or polishing of alloys, gypsum, porcelain, or denture base material in dental laboratories have been measured. The particle size distributions were evaluated by means of light and electron microscopy as well as by coulter-counting techniques. The measurements revealed the occurrence of a high proportion of respirable dust associated with these operations. consequently, the use of efficient ventilation systems is strictly necessary to ensure industrial safety with respect to air pollution in the working environment of dental laboratories.

摘要

先前的一项研究表明，在牙科实验室的各种工作操作中，如果不使用适当的通风系统，各种元素或化合物的阈限值可能会被大大超过。这涉及到使用铬钴合金、汞合金铸模、瓷器和石膏。在本研究中，已对牙科实验室中合金、石膏、瓷器或义齿基托材料切割、研磨或抛光产生的颗粒尺寸分布进行了测量。通过光学显微镜、电子显微镜以及库尔特计数技术对颗粒尺寸分布进行了评估。测量结果显示，这些操作会产生高比例的可吸入粉尘。因此，为确保牙科实验室工作环境中的空气污染方面的工业安全，严格有必要使用高效通风系统。